Is there a way to get linear HSV sliders in colorpicker?
Short answer: No. Not via the GUI widget that is. RGB should be linearized.

Longer answer: If more imagers around Blender begin to understand what an EOTF is, perhaps. The ideal solution is that all UI elements allow an imager to pick the transfer function as required by their current context. Editing normals within a given range? Use a particular linear transform. Manipulating a particular log? Use it. Etc.

Why is the widget nonlinear? Because it has to be corrected for your display output. That is, if the widget were not under a transform, and your reference were different from 709 lights, you would not see the right colour in the wheel.

There is an exhaustive thread located here for anyone interested in the nuances of this.

Until Blender chooses to permit an imager to select the colour transform required on a UI element, this is an impossible situation to solve for all imaging contexts.

Also, as stated many other places, not using a display transform and forcing a power curve is far from ideal and should be avoided at all costs. A better path is to have your voice heard and have Blender fix the broken colour pipe UI paradigm.